Check for MOZJS_ARCHIVE before Building from Source (servo#496)

Signed-off-by: Redfire <[email protected]>

Author: redfire75369

mozjs-sys/Cargo.toml

@@ -2,7 +2,7 @@
 name = "mozjs_sys"
 description = "System crate for the Mozilla SpiderMonkey JavaScript engine."
 repository.workspace = true
-version = "0.128.0-8"
+version = "0.128.0-9"
 authors = ["Mozilla"]
 links = "mozjs"
 build = "build.rs"

mozjs-sys/build.rs

@@ -123,6 +123,8 @@ fn should_build_from_source() -> bool {
             "Environment variable MOZJS_CREATE_ARCHIVE is set. Building from source directly."
         );
         true
+    } else if env::var_os("MOZJS_ARCHIVE").is_some() {
+        false
     } else if env::var_os("CARGO_FEATURE_DEBUGMOZJS").is_some() {
         println!("debug-mozjs feature is enabled. Building from source directly.");
         true